<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>this</title>
</head>

<body>
    <script type="text/javascript">
        console.log(111,name0,name3,name4);
        // undefined
        var name0 = 'name'
        // ReferenceError
        const name1 ='name1'
        let name2 = 'name2'
        function name3(){

        }
        // undefined
        var name4 = ()=>{

        }
        // ReferenceError
        let name5 = ()=>{
            
        }
    </script>
</body>

</html>